Variable-speed mechanism for lathes



Q A Z- Q PATENTEDJANJZ,19.04;":

I w. LODGE. VARIABLE SPEED MECHANISM FOR-LATHES.

APPLICATION FILED JUNE 12', 1903.

N0 MODEL. 2 SHEETS-1133! 1.

QgNd. 749,492. PATENTED-JANP lZ, 1904.

' w. LODGE.

VARIABLE SPEED MECHANISM FOR LATHES.

APPLICATION FILED JUNE 12, 1903.

no nonnn. 2 SHEETSSHEET 2.

arm/"M IUNITED STATES Patented January 12, 1904.

PATENT OFFICE.

WILLIAM LODGE, or CINCINNATI, OHIO.

VA FilA B LE-SP E ED MECHANISM FOR LATHES.

. SPECIFICATION forming part of Letters Patent No. 749,492, datedJanuary 12, 1904.

' Application filed June 12, 1903. Serial No. 161,200. (No model.)

.To all whom it may'concern;

I I .Be it known that I, WILLIAM LODGE, a citizen of the United States,residing at Cincin- 1 nati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Variable-SpeedMechanism for Lathes, of which the following is a specitween thespindle-operating shaft and the carriage-operating shaft.

My invention further relates to a rapid-reduction lathe of theparticular type illustrated in Patent No. 7 23, 704, granted March24,1903, to Montstream, Schellenbach, and Lodge.

This machine is designed to reduce considerable depth of metal in onecut, and hence the I *tIELIlSIIllSSlOIl devices require a peculiar con-Sf/1110131011 and arrangement, the features of which are fully set forthin the accompanying drawings, making a part of this specification. 1Figure 1 is a front elevation of my improvement. Fig. I 2 is an endelevation thereof.

Fig. 3 is a sectional view on line a: a: of Fig.2.

A represents the bed of the lathe; F F, the portion of the head-stockforming end jourrial-bearings for the various shafts.

D represents a bracing-arm extending from the bed A to apedestal C, inthe end of which is journaled a driving-shaft E, bearing thecone-pulleys B. The other end of shaft E is journaled in the head-stockFF I G represents the shaft for operating the spindle, and it isjournaled in the head-stock 1 2 represent gear-wheels of differentdiameter on shaft E, adapted to be slid thereon.

3 4 represent gear-wheels fixed on shaft G,

.intermeshing with gears 3 and 4, respectively.

Any suitable means may be employed to bring gear-wheels 1 and 2 tointer-mesh with gears 3 and 4, respectively, whereby-two differentspeeds are transmitted to the spindle-operating shaft G. (See Fig. 2.)

Outside of the head-stock F on the end of shaft G is fixed a pinion 6,(see Figs. 1 and2,)

intermeshing with an intermediate gear-wheel 7 mounted on the stud-shafta, journaled in the head-stock F.

J is a shaft journaled in the head-stock F F upon the end thereof. Onthe outside of the head-stock F is a gear-wheel 8, intermeshed with theintermediate gear-wheel 7 K represents a shaft opposite shaft J,likewise journaled in the head-stock F F, and upon these two shaftsbetween bearing-supports F F are mounted the variable-speed gearing,which will be later described.

H represents a shaft for operating the carriage directly. It is drivenfrom shaft K.

L represents a stationary shaft forming one of the means for operatingthe carriage.

M represents a reversing-shaft for the carriage, it being a fast-speededshaft operated by a belt-engaging pulley-wheel 5 on the end of saidshaft.

9 10 11 12 represent gear-wheels loose on shaft J. Gear-wheels 11 and 12are keyed or formed upon the hub-sleeve b of gear 12, which is loose onthe shaft J.

0 represents a spring-key sliding internal of shaft K and adapted toclutch gears 9 or 10 or 11 and 12 on. shaft J. On shaft K are looselymounted the cooperating differentdiameter gear-wheels 13 14 15 16,meshing with the driving gear-wheels 9, 10, 11, and 12, respectively.Gear-wheel 15 has a hubsleevee, uponwhich gear-wheels 13 and 14 arekeyed. I Hub-sleeve e is loose on shaft K, and gear-wheels 13, 14, and15 revolve thereon as a unit. Gear-wheel 16 is loose on shaft KL Betweenthe sleeve 6 and the hub of gearwheel 16 on shaft K is interposed ashifting clutch 0Z, adapted to fix gear-wheels 13 14 15 or gear-wheel 16on shaft K. Between gears 9 10 11 and loose on shaft J are interposedrings, the function of which is to prevent key cfrom engaging two gearsat a single instant.

17 represents a gear-wheel fixed on shaft K and intermeshing with a gearwheel 18, fixed to the end of shaft H. (See Fig. 3.)

By clutching gear-wheels 1 or 2 to shaft E two speeds may be given tothe spindle-operating shaft G.

The variations between the spindle-operating shaft G and thecarriage-operating shaft are effected as follows: Assuming the clutch (Zto be engaging the hub-sleeve e and the key 0 to be in position shown inFig. 3, it is obvious that the speed is transmitted through gear-Wheels11, 15, 17, and 18. If the key 0 be shifted one step to the left,obviously the speed is transmitted through gear-wheels 10, 14, 17, and18. If key 0 is shifted the third step to the left, obviously the speedis transmitted through gear-wheels 9, 13, 17 and 18. Key 0, being in thefirst-described position shown in Fig. 8, fixing sleeve 6 to shaft J,and clutch (1 being shifted to fix gear-wheel 16 to shaft K, obviouslythe speed is transmitted through gear-wheels 12, 16, 17, and 18. Ifclutch d remain attached to the hub of gear-wheel 16 and key 0 beshifted the second step to the left of the position shown in Fig. 3,obviously the speed is transmitted through gear-wheels 10, 14, 15, 11,12, 16, 17, and 18. If clutch I) remain in engagement with the hub ofgear-wheel 16 and the key 0 be shifted the third step to the left of theposition shown in Fig. 3, obviously the speed will be transmittedthrough gear wheels 9, 13, 15, 11, 12, 16, 17, and 18, in the ordernamed. Thus by this simple arrangement six variations of speed may beobtained between the spindleoperating shaft and the carriage-operatingshaft, and all the speedvarying gear-wheels are firmly mounted uponshafts having substantial bearings at each end in the frame of thehead-stock. This arrangement gives all the variations of speed requiredin a heavy-power machine of this caliber and at the same time gives tothe speed changing and transmitting devices the substantial rigidity andsecurity essential in a machine designed to do this class of work.

Having described my invention, I claim 1. In an engine-lathe a frame, aspindle-operating shaft, and a carriage-operating shaft, journaled inthe frame, a pair of shafts journaled in the frame, transmitting devicesbetween the first of said shafts and the spindleoperating shaft, andbetween the second shaft and the carriage-operating shaft, a pluralityof difierent-diameter gear-wheels loose on one of said shafts, a slidingkey adapted to fiX any of said gear-wheels to said first shaft, two ormore of the gear-wheels on the second shaft being separated from theother gear-Wheels on said shaft and fixed to revolve on a common hub,and a shifting clutch on said second shaft between the said separatedgear-wheels, substantially as described.

2. In an engine-lathe, a frame, a spindle-operating shaft, acarriage-operating shaft, and two parallel intermediate shafts journaledin the frame,gear-wheels connecting the parallel intermediate shafts tothe carriage-operating and spindle-operating shafts, gear-wheels looseon one of said intermediate shafts, a sliding key for fixing anyselected one to its shaft, intermeshing opposing gear-wheels on theother intermediate shaft, all of said last-named gears save one beingfixed to rotate on a common hub, a shifting clutch on said secondintermediate shaft between the common gear-Wheel hub and the hub of theremaining gear-wheel which is loose on said second shaft, substantiallyas described.

3. In an engine-lathe, a frame, a spindle-operating shaft, acarriage-operating shaft, and two intermediate shafts journaled in theframe, gear-wheels between one of said shafts and the spindle-operatingintermediate shaft, and gear-wheels between the other intermediate shaftand the carriage-operating shaft, a series of different-diametergear-wheels on the first intermediate shaft, loose thereon, two of saidgear-wheels having a common hub, a sliding key on the first shaftadapted to fix any of said gear-wheels to the'said shaft, intermesh- 7ing different-diameter gear-wheels on the secmy hand.

v WILLIAM LODGE.

Witnesses:

W. R. WooD, OLIVER B. KAISER.

